JP2016179526A - Driving-in tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continue driving-in work even if a power source is cut off in the present invention, since there is the problem of becoming unable to continue the driving-in work when a battery power source is conventionally cut off, though electric starting control for executing driving-in operation is conventionally executed when ON operation of a trigger and ON operation of a contact arm are executed within a constant time.SOLUTION: A first mode of executing mechanical starting control and a second mode of executing electric starting control, are switchably constituted. Only on the second mode, when ON operation of a trigger 12 and ON operation of a contact arm 6 are executed within a reference time T, driving-in is executed by turning on a second operation part 14, and on the first mode, driving-in is made possible by the mechanical starting control by operation order of the trigger 12 and the contact arm 6 without depending on such electric control. Thus, even if power source supply is cut off, driving-in work by the first mode can be continued.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a driving tool such as a nailing machine.

  For example, in a nailing machine using compressed air as a power source, an operation of pressing the contact arm provided at the tip of the driving nose portion against the material to be driven and moving it upward relative to the injection port (on operation of the contact arm); , The operation of pulling the trigger with the fingertip (trigger on operation) is performed on the condition that the main body is operated, and only one of the on operations does not perform the driving operation. An inadvertent driving operation is avoided.

  Also, with this type of driving tool, the contact arm is first pressed against the material to be driven and turned on, and then the trigger is pulled and the trigger is turned on while the driving tool is moved while the contact arm is turned on. It is possible to perform various driving operations such as dragging by operation and swinging to turn the contact arm on and off by swinging the driving tool up and down while pulling the trigger. In aiming and dragging, the next driving operation is not performed unless the trigger is once turned off after the driving operation (single shot mode). On the other hand, in swinging, a driving operation can be continuously performed while pulling the trigger (repetitive driving mode). Patent Document 1 below discloses a mode switching technique in which the single shot mode and the continuous shot mode are switched depending on which of the contact arm ON operation and the trigger ON operation is operated first (sequential control). Has been.

  Further, in Patent Document 2 below, there is a mode switching technique having a configuration in which a contact arm on-operation and a trigger on-operation are individually detected by a microswitch and an elapsed time after the trigger on operation is measured by a timer. It is disclosed. In the single shot mode, a driving operation is performed by turning on the contact arm before a predetermined time elapses after the trigger is turned on, and then the state in which the driving operation is prohibited is reset by turning off the trigger. In continuous firing mode, the timer reset and driving operation can be repeated on the condition that the contact arm is turned on a certain time after the trigger is turned on. When the operation is not performed, the subsequent ON operation is invalidated and the driving operation is prohibited, or the driving operation is also disabled by engaging the lock pin with the contact arm and locking it in the OFF position. According to such a mode switching technique, for example, when the contact arm is accidentally brought into contact with another part when holding the grip portion in the continuous firing mode and carrying it with the trigger turned on, an inadvertent driving operation is performed. Avoided.

JP-A-9-109058 Japanese Patent No. 3287172

  However, according to the technique disclosed in the above-mentioned Patent Document 2, when the remaining capacity of the battery is reduced and power supply to the microswitch and the controller that operates in response to these input signals is stopped or shut off. The driving operation was not performed at all, and the work had to be stopped.

  The present invention has been made to solve the above-described conventional problems, and it is an object of the present invention to make it possible to continue the driving operation even when the battery for electric control is exhausted.

  Said subject is solved by each following invention. The first invention is a driving tool for driving the main body on the condition that both the trigger ON operation and the contact arm ON operation are performed. In the first invention, the first mode (mechanical activation control mode) in which the driving operation is performed only when the trigger is turned on after the contact arm is turned on, and before and after the trigger or contact arm is turned on. The second mode (electrical activation control mode) in which the driving operation is performed without any change is provided. In the first aspect, in the second mode, after the on operation of one of the trigger or the contact arm, the timer control is performed in which the main body is driven when the other on operation is performed within the reference time. On the other hand, the first mode has a configuration in which the driving operation is performed when the trigger pulling operation is mechanically effective separately from the timer control.

  According to the first invention, in the first mode, the trigger pulling operation becomes effective and the driving operation is performed only when the contact arm is turned on first and then the trigger is turned on. On the other hand, in the second mode, even if either the contact arm or the trigger is turned on first, the driving operation is performed when both of them are turned on. When the elapsed time is within the reference time, timer control is performed so that the main body is driven. For this reason, in the second mode, a power source (electric power source for electrical control) is required to make the controller including timer control function. For this reason, in the second mode, as a result of the controller not functioning when the power is cut off or the remaining capacity of the battery is reduced, the driving tool is stopped. However, by switching to the first mode, the trigger pulling operation is enabled by the mechanical configuration and the driving tool can be operated regardless of the timer control of the controller (without receiving power supply). The driving operation (single driving operation) can be continued. In either the first mode or the second mode, when carrying the grip part while pulling the trigger and carrying it, the contact arm touches another part after the reference time has elapsed and is turned on. Inadvertent driving is not performed.

  According to a second invention, there is provided a driving tool provided with a start valve for switching the supply / exhaust state of the compressed air with respect to the main body using the compressed air as a power source for driving operation. In the second aspect of the invention, the first operating part that is provided integrally with the contact arm and moves between an on position where the start valve is turned on and an off position where the start valve is turned off, and the start valve is independent of the first actuating part. A second actuating portion that moves between an on position to be turned on and an off position to be turned off is provided. The first operating part is a driving tool having a function of turning on and off the starting valve in both the first mode and the second mode, and the second operating part has a function of turning on and off the starting valve only in the second mode. .

  According to the second invention, in both the first mode and the second mode, when the contact arm is turned on, the first operating portion is moved to the on position, thereby turning on the start valve. In the first mode, the start valve is turned on / off by the movement of the first actuating portion, and the second actuating portion is not involved in the on / off operation of the start valve. The second operating unit is involved in the on / off operation of the start valve only in the second mode. The second actuating portion enables a continuous firing operation by moving to the on position and turning on the start valve when the start valve is not turned on by the movement of the first actuating portion to the on position.

  A third invention is the driving tool according to the second invention, wherein the second operating part is configured to move to an on position using compressed air supplied by switching of the electromagnetic valve as a power source.

  According to the third invention, since the second operating part is configured to move to the on position by the air force of the compressed air, the second operating part is larger than the configuration using, for example, a solenoid actuator as a power source. You can move a greater distance with force.

  The fourth invention is a driving method according to the third invention, wherein the compressed air supplied to the second operating part by switching the electromagnetic valve is divided from the pressure accumulating chamber for accumulating the compressed air supplied to the main body part. It is a tool.

  According to the fourth invention, the second operating portion moves between the on position and the off position using the compressed air supplied to the driving tool as a power source. From this, according to 4th invention, the 2nd operation part can be moved using the supplied compressed air efficiently.

  5th invention is the driving tool which provided the 1st and 2nd idler in the trigger so that relative movement was possible in any one of 2nd-4th invention. In the fifth aspect of the invention, the first idler is pushed and moved to the on position by the movement of the first operating portion to the on position, and the second idler is pushed and moved to the on position of the second working portion. Move to. Further, when the first idler moves to the on position, the second idler integrally moves to the on position, while the second idler can move to the on position independently of the first idler. In the fifth invention, the valve stem of the start valve is engaged with the second idler. For this reason, when the second idler is moved to the on position, the valve stem is moved to the on position and the start valve is turned on, whereby compressed air is supplied to the main body portion and a driving operation is performed.

  According to the fifth aspect of the invention, the first and second idlers move together by the on / off operation of the trigger, and one or both of the first and second idlers are pushed by the movement of the first and second actuating parts. Move relative to the trigger. When the first idler is pushed by the movement of the first operating part to the on position and the first idler moves to the on position, the second idler also integrally moves to the on position. Even if the first idler is not pushed to the on position by the first actuating part, the second idler is pushed to move to the on position when the second actuating part moves to the on position. The valve stem of the start valve is engaged with the second idler. Therefore, when the first idler is pushed by the first operating portion and moved to the on position, the valve stem is turned on for both the case where the second idler is pushed by the second working portion and moved to the on position alone. Is pressed to turn on the start valve, so that the driving operation is performed.

  According to a sixth invention, in any one of the third to fifth inventions, a first on-position detection member for detecting the on-position of the contact arm and a second on-position detection member for detecting the on-position of the trigger are provided. It is a driving tool.

  According to the sixth aspect of the present invention, the on-positions of the contact arm and the trigger are detected by the detection members. For example, a micro switch can be used for the first on-position detection member and the second on-position detection member. By using these detection members, the operation mode control of the driving tool can be performed based on the position information of the contact arm and the trigger.

  According to a seventh invention, in the sixth invention, there is provided a controller for performing on / off control of the solenoid valve based on position information of the contact arm and the trigger obtained by the first and second on-position detecting members and a time difference between the on operations of both. It is a driving tool.

  According to the seventh aspect, the controller controls the second actuating member to move between the on position and the off position based on the position information of the contact arm and the trigger and the time difference between the on operations of both.

  An eighth invention is a driving tool comprising a mode switching lever for switching between the first mode and the second mode in the seventh invention. In the eighth aspect of the invention, only when the mode switching lever is switched to the second mode, the controller is supplied with electric power, and the position information of the contact arm and the trigger is electromagnetic based on the time difference (elapsed time) between the ON operations. The valve is configured to perform on / off control (timer control).

  According to the eighth invention, timer control is performed in the second mode in which the mode switching lever is switched to the second mode side. According to this timer control, for example, after the trigger is turned on, the driving operation is performed on the condition that the contact arm is turned on within a predetermined time. When the contact arm is turned on after a predetermined time has elapsed since the trigger was turned on, the driving operation is not performed. For this reason, for example, when carrying the driving tool while holding the grip portion of the driving tool and pulling the trigger with a fingertip, the driving operation is performed even if the contact arm accidentally contacts another part and is turned on. Is not done. By switching the mode switching lever to the first mode side, the driving tool can be operated in the first mode. In the first mode, the above timer control is not performed.

1 is an overall side view of a driving tool according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the main-body part of a driving tool and an activation device. It is a perspective view of the starting device of a driving tool. It is a control block diagram of an activation device. It is a figure which shows the operation state of a starting device. This figure shows an initial state. In this initial state, both the trigger and the contact arm are in the off position. The valve stem of the starting valve is also in the off position. It is a figure which shows the operation state of the starting device in a 1st mode. This figure shows a state in which the trigger is turned on. It is a figure which shows the operation state of the starting device in a 1st mode. This figure shows a state in which the contact arm is turned on after the trigger is turned on. In this state, the starting valve is not turned on, so that the driving operation is not performed. It is a figure which shows the operation state of the starting device in a 1st mode. This figure shows a state in which the contact arm is turned on. It is a figure which shows the operation state of the starting device in a 1st mode. This figure shows a state in which the trigger is turned on after the contact arm is turned on. In this state, the starting valve is turned on and a driving operation is performed. It is a figure which shows the operation state of the starting device in 2nd mode. This figure shows a state in which the trigger is turned on. It is a figure which shows the operation state of the starting device in 2nd mode. This figure shows a state in which the contact arm is turned on after the trigger is turned on. In this state, as a result of the second idler being pushed to the ON position by the second operating portion, the start valve is turned on and the driving operation is performed. It is a figure which shows the operation state of the starting device in 2nd mode. This figure shows a state in which the contact arm is turned on. It is a figure which shows the operation state of the starting device in 2nd mode. This figure shows a state in which the trigger is turned on after the contact arm is turned on. In this state, as a result of both the first and second idlers being pushed to the on position, the start valve is turned on and the driving operation is performed.

  Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, in the present embodiment, a compressed air drive type nailing machine is illustrated as an example of the driving tool 1. The driving tool 1 includes a main body 2 that includes a piston 2 a that reciprocates using compressed air as a power source, a grip 3 that protrudes from the side of the main body 2 to the side, A driving nose portion 4 extending downward from the lower portion (in the driving direction of the driving tool), and a magazine 5 provided between the driving nose portion 4 and the grip portion 3 and capable of loading a plurality of driving tools. .

  A contact arm 6 is supported at the tip of the driving nose portion 4 so as to be relatively displaceable up and down. One condition for performing the driving operation is to press the contact arm 6 against the driven material and move it up relatively. The contact arm 6 has an annular contact portion 6a located at the tip of the driving nose portion 4 and around the injection port, and an extension portion 6b extending upward from the contact portion 6a to the vicinity of the trigger 12. ing. The contact portion 6a and the extension portion 6b are integrally driven and supported along the nose portion 4 so as to be displaceable up and down within a certain range.

  The activation device 10 according to the present embodiment is disposed near the base of the grip portion 3 and on the side portion of the main body portion 2. The activation valve 11 is turned on by the activation operation of the activation device 10. When the start valve 11 is turned on, compressed air is supplied to the piston upper chamber 2b of the main body 2. When compressed air is supplied to the piston upper chamber 2b, the piston 2a moves down in the cylinder 2c and is driven. A long rod-shaped driver 2d is attached to the lower surface of the piston 2a. When the driver 2d moves down in the driving nose portion 4 as the piston 2a moves downward, one driving tool is driven out from the tip (injection port) of the driving nose portion 4. One driving tool is supplied from the magazine 5 into the driving nose part 4 one by one.

  As shown in FIG. 1, a mode switching lever 7 for switching between the first mode and the second mode for the driving mode of the driving tool 1 is provided on the side of the main body 2. When the mode switching lever 7 is switched to the first mode side, when the trigger 12 is turned on after the contact arm 6 is turned on first, the on operation of the trigger 12 is mechanically enabled and a driving operation is performed as described later. The On the other hand, when the contact arm 6 is turned on after the trigger 12 is turned on, the on operation of the contact arm 6 becomes invalid and no driving operation is performed. Thus, in the first mode, sequential control (mechanical activation control) is performed in which the driving operation is performed when the contact arm 6 is turned on first with respect to the operation order of the trigger 12 of the contact arm 6. Therefore, the first mode corresponds to a single shot mode in which the next driving operation cannot be performed unless the trigger 12 is turned off once after the driving operation.

  When the mode switching lever 7 is switched to the second mode side, the driving tool 1 is swung up and down while the trigger 12 is pulled, and the contact arm 6 is repeatedly turned on and off to repeat the driving operation. Strike). As shown in FIG. 4, the switching state of the mode switching lever 7 is detected by the mode switching switch 31. When the mode switch lever is switched to the second mode side, the mode switch 31 is turned on. The output signal of the mode switch 31 is input to the controller 30 described later as position information of the mode switch lever 7. A micro switch is used as the mode switch 31.

  The present embodiment is provided with a characteristic that the activation device 10 does not have in the past. Since the basic configuration of the driving tool 1 is not particularly changed in the present embodiment, a detailed description thereof is omitted. Details of the activation device 10 of the present embodiment are shown in FIGS. The starting device 10 of the present embodiment includes the above-described starting valve 11, trigger 12, and first and second operating parts 13 and 14. The start valve 11 is accommodated on the lower surface of the grip portion 3 on the base side. A lower portion of the valve stem 11a is protruded toward the trigger 12. The valve stem 11a of the start valve 11 is supported so as to be movable up and down (on position and off position). FIG. 2 shows a state where the valve stem 11a is located at the off position. The starting valve 11 is turned on when the valve stem 11a moves up against the spring biasing force from the off position. When the start valve 11 is turned on, the head valve 2e is displaced downward and opened by the air pressure acting downward. When the head valve 2e is opened, the compressed air accumulated in the pressure accumulating chamber 3a in the grip portion 3 is supplied to the piston upper chamber 2b. When the valve stem 11a is returned downward by the spring biasing force, the start valve 11 is turned off. When the start valve 11 is turned off, the head valve 2e is displaced upward by the air pressure acting upward, whereby the piston upper chamber 2b is closed with respect to the pressure accumulation chamber 3a. The piston upper chamber 2b is closed and released to the atmosphere at the same time, and the piston 2a moved downward is returned to the top dead center (initial position).

  The trigger 12 is supported via a support shaft 12a so as to be tiltable up and down. A first idler 15 and a second idler 16 are supported on the back side (upper side) of the trigger 12. The first idler 15 and the second idler 16 are supported via a common support shaft 17 so that they can be tilted up and down independently of each other. Both the first idler 15 and the second idler 16 are urged by the torsion spring 18 in the upward tilting direction (on position side).

  As shown in FIG. 3, an engagement edge portion 16 a is integrally provided on the back surface of the second idler 16. The engaging edge portion 16 a protrudes from the back side of the first idler 15. In the initial state, the engaging edge portion 16a is brought into contact with the back surface of the first idler 15, and the first idler 15 and the second idler 16 are held in a side-by-side state in which the front sides are flush with each other. Therefore, as described later, when the first idler 15 is pushed upward (on position side), the first idler 15 and the second idler 16 are integrally tilted upward. On the other hand, when the second idler 16 is pushed upward, the second idler 16 is tilted upward alone. Therefore, the first idler 15 moves to the on position integrally with the second idler 16, and the second idler 16 can move to the on position independently. When the second idler 16 independently moves to the on position, the engaging edge 16 a is separated from the back surface of the first idler 15. For this reason, a state in which only the first idler 15 is located at the off position is allowed. The state in which the first idler 15 is located at the off position and the second idler 16 is moved to the on position occurs when the trigger 12 is first turned on in the second mode (FIG. 11). Therefore, this operation state will be described later.

  As shown in FIG. 3, the activation device 10 of the present embodiment includes a first operating unit 13 and a second operating unit 14. The first operating part 13 is provided integrally with the contact arm 6. The first actuating part 13 is integrally provided on the upper part of the extension part 6b of the contact arm 6, and further extends toward the trigger 12 (upward). As shown in FIGS. 3 and 4, the distal end of the first operating portion 13 is directed to the upper portion of the first idler 15. When the contact arm 6 is moved up to the on position by being pressed against the workpiece, the first operating portion 13 is moved upward toward the first idler 15 together with the contact arm 6.

  As will be described later, in the on-position state in which the trigger 12 is pulled, the first actuating part 13 passes above the first idler 15 as the contact arm 6 is turned on (idle swing). In the off position state in which the trigger 12 is not pulled, the first actuating portion 13 is abutted against the upper portion of the first idler 15 as the contact arm 6 is turned on, and the trigger 12 is further moved to the on position in this abutting state. By performing the pulling operation, the first idler 15 is pushed to the on position against the torsion spring 18. When the first idler 15 is pushed by the first operating portion 13 and moves to the on position, the second idler 16 integrally moves to the on position via the engagement edge 16a. When the second idler 16 moves to the on position, the valve stem 11a of the activation valve 11 is pushed to the on position, and the activation valve 11 is turned on. As described above, when the start valve 11 is turned on, the piston 2a is moved downward to perform a driving operation.

  As shown in FIG. 4, the first operating part 13 and the second operating part 14 are supported by a support block part 20 provided in the main body part 2. The first operating unit 13 is supported by the support block unit 20 so as to be vertically displaceable. The support block portion 20 is provided with a cylinder portion 20 a that houses the piston portion 14 a provided in the second operating portion 14. The cylinder portion 20a and the piston portion 14a constitute a single-acting cylinder. A portion corresponding to the rod of the cylinder is a second operating portion 14. The upper chamber 20aa side of the cylinder portion 20a (the chamber on the right side in the drawing with respect to the piston portion 14a) is open to the atmosphere. A compression spring 21 is interposed between the upper chamber 20aa of the cylinder part 20a and the piston part 14a. The second operating portion 14 is returned to the off position shown in FIG. 4 by the urging force of the compression spring 21.

  The lower chamber 20ab side of the cylinder portion 20a (the chamber on the left side of the piston portion 14a) is hermetically sealed. An electromagnetic valve 23 is connected to the lower chamber 20ab of the cylinder portion 20a via an air pipe 22. By switching the electromagnetic valve 23, compressed air is supplied to and discharged from the lower chamber 20ab of the cylinder portion 20a. When compressed air is supplied to the lower chamber 20ab, the piston portion 14a moves upward, and thereby the second operating portion 14 protrudes upward (on position) toward the second idler 16. When the second operating portion 14 is protruded upward by the force of air pressure, the tip end portion is abutted against the second idler 16, and the second idler 16 is further ejected in this abutting state, whereby the second idler 16 is torsion spring. It is pushed upward against 18. When the second idler 16 is pushed by the second operating part 14 and moves to the on position, the valve stem 11a of the activation valve 11 is pushed to the on position side, and thereby the activation valve 11 is turned on.

  When the solenoid valve 23 is switched to the closed side, the lower chamber 20ab of the cylinder portion 20a is shut off from the pressure accumulating chamber 3a and exhausted (released to the atmosphere). When the lower chamber 20ab is opened to the atmosphere, the piston portion 14a is moved downward by the urging force of the compression spring 21, and the second operating portion 14 is returned to the off position side. An air pipe 24 branched from the pressure accumulating chamber 3 a of the grip portion 3 is connected to the electromagnetic valve 23. For this reason, compressed air is supplied to the lower chamber 20ab of the cylinder part 20a via the electromagnetic valve 23 from the pressure accumulation chamber 3a. The electromagnetic valve 23 is switched between an open side and a closed side by a power source supplied through a controller 30 described later.

  The ON position of the contact arm 6 is detected by the first ON position detection member 25. As shown in FIG. 4, the extension portion 6 b of the contact arm 6 is provided with a detection portion 6 c. The detection part 6c is spring-biased in the protruding direction so as to absorb the impact on the first on-position detection member 25. A compression spring 8 is interposed between the extension portion 6 b and the support block portion 20. Due to the biasing force of the compression spring 8, the contact arm 6 is biased to the lower off position (initial position) side. When the contact arm 6 is in the initial position, the contact portion 6a slightly protrudes in the driving direction with respect to the tip (injection port) of the driving nose portion 4. The position where the contact arm 6 is moved upward by the amount of protrusion is the ON position of the contact arm 6.

  A first on-position detection member 25 is disposed to face the detection unit 6c. The first ON position detection member 25 is supported by the support block unit 20. When the contact arm 6 is displaced to the on position, the detection unit 6c contacts the first on position detection member 25, and the first on position detection member 25 is turned on. The ON signal of the first ON position detection member 25 is input to a timer circuit 33 of the controller 30 described later.

  The on position of the trigger 12 is detected by the second on position detection member 26. The second on-position detection member 26 is also supported by the support block unit 20. When the trigger 12 is pulled to the on position, the tilt base end side comes into contact with the second on position detection member 26, and the second on position detection member 26 is turned on. An ON signal of the second ON position detection member 26 is also input to the timer circuit 33 of the controller 30. The first on-position detecting member 25 and the second on-position detecting member 26 are push button type micro switches.

Both the ON signal of the first ON position detection member 25 and the ON signal of the second ON position detection member 26 are input to the timer circuit 33 of the controller 30. In the timer circuit 33, an input time difference (elapsed time T ₁ ) between the ON signal of the first ON position detection member 25 and the ON signal of the second ON position detection member 26 is measured. If it is determined that the elapsed time T ₁ of the inputs of both the on-position detecting members 25 and 26 is within a predetermined reference time T ₀ (T ₁ ≦ T ₀ ), the controller 30 supplies a power supply command from the battery 32. Power is supplied to the electromagnetic valve 23. When power is supplied from the battery 32, the solenoid valve 23 operates to open, and the air pipe 22 and the air pipe 24 are communicated, whereby compressed air is supplied from the pressure accumulating chamber 3a to the lower chamber 20ab side of the cylinder portion 20a. . When compressed air is supplied to the lower chamber 20ab, the second operating part 14 is protruded to the on position side. When the second operating unit 14 is protruded to the on position side, the second idler 16 is pushed to the on position side. By placing the second idler 16 on the on position side, the valve stem 11a is moved to the on position, whereby the start valve 11 is turned on. When the start valve 11 is turned on, a driving operation is performed in the main body 2.

  The stroke between the ON position and the OFF position of the second operating part 14 is set to be substantially the same as the stroke between the ON position and the OFF position of the first operating part 13. For this reason, as shown in FIG. 4, the front end portions of the first operating portion 13 and the second operating portion 14 that are both in the off position are supported by the first idler 15 and the second idler supported side by side via the support shaft 17. 16 are separated from each other at substantially the same interval.

  The activation device 10 includes a battery 32 for supplying power to the controller 30, the electromagnetic valve 23, the first on-position detection member 25, and the second on-position detection member 26. When the mode switching lever 7 is switched to the second mode side, the mode switching switch 31 is turned on and power is supplied from the battery 32 to the controller 30, the first on-position detection member 25 and the second on-position detection member 26. . Further, the power can be supplied from the battery 32 to the electromagnetic valve 23 under certain conditions. On the other hand, when the mode switching lever 7 is switched to the first mode side, the mode switching switch 31 is turned off, and the battery for the controller 30, the solenoid valve 23, the first on-position detecting member 25, and the second on-position detecting member 26 is turned off. The power supply from 32 is cut off.

  For this reason, in the first mode, the on / off of the start valve 11 is mechanically controlled only by the on / off operation of the first operating part 13 on the contact arm 6 side. In the first mode, the ON position of the first operating portion 13 by the first ON position detection member 25 is not detected, and the ON position of the trigger 12 is not detected by the second ON position detection member 26. Therefore, in the first mode, the electromagnetic valve 23 is brought into a stopped state when the power is cut off, so that the second operating unit 14 does not operate and is held in the off position shown in FIG.

  FIG. 5 and subsequent figures show the operating state of the activation device 10 in the first mode and the second mode. Hereinafter, the operating state of the activation device 10 will be described for each of the first mode and the second mode. FIG. 5 shows an initial state of the activation device 10 in a non-operation state where the contact arm 6 is not turned on and the trigger 12 is not pulled. Except for the mode switching lever 7, the initial states of the first mode and the second mode are common. FIG. 5 shows the initial state in both modes.

  First, the case where the mode switching lever 7 is switched to the first mode side will be described. 5-9 which show a 1st mode, illustration of the 2nd action | operation part 14, the 1st and 2nd ON position detection parts 25 and 26, and the detection part 6c which function only in a 2nd mode is abbreviate | omitted. FIG. 6 shows a state in which the trigger 12 is first pulled and operated from the initial state shown in FIG. 5 in the first mode. As shown in the figure, in this state, the first idler 15 and the second idler 16 are pushed by the spring force of the valve stem 11a and tilted in a direction to displace the tilting tip side downward (left side in the figure). . For this reason, as shown in FIG. 7, even if the first operating part 13 is moved upward to the right side in the drawing by subsequently turning on the contact arm 6, the first operating part 13 passes the side of the first idler 15. (Empty). As a result, the first idler 15 is not pushed to the on position side by the first actuating portion 13, so the second idler 16 does not move to the on position side. Since the second idler 16 does not move to the on position, the valve stem 11a is not pushed to the on position side, and therefore the start valve 11 is not turned on. Since the start valve 11 is not turned on, the driving operation is not performed in this case.

  Next, FIG. 8 shows a state in which the contact arm 6 is first turned on from the initial state shown in FIG. In this state, the first operating unit 13 pushes the first idler 15 toward the start valve 11. Therefore, when the trigger 12 is subsequently pulled and operated as shown in FIG. 9, the tilting proximal end side of the first idler 15 is pushed by the first operating portion 13 while the tilting distal end side is pushed by the first valve 11 side ( Displace to the ON side). As a result of the first idler 15 being displaced to the on side, the second idler 16 is integrally displaced to the on side via the engagement edge portion 16a. The valve stem 11a is pushed to the on position by the second idler 16 that is displaced to the on side, and the start valve 11 is turned on. When the start valve 11 is turned on, a driving operation is performed in the main body 2.

  After the driving operation is completed, when the contact arm 6 is turned off by lifting the driving tool 1 from the driving site, the state shown in FIG. 6 is restored. As shown in the figure, when the contact arm 6 is turned off, the first idler 15 is pushed back to the off position by the spring force of the valve stem 11a, and thus the starting valve 11 is turned off. However, even if the trigger arm 12 is pulled and the contact arm 6 is returned to the off position and the start valve 11 is turned off, or the contact arm 6 is turned on again, the first actuating part 13 as shown in FIG. Since the first idler 15 is not pushed to the on position, the driving operation (repetitive driving) is not performed. In this case, the next driving operation can be performed by turning off the contact arm 6 and releasing the pulling operation of the trigger 12 to return to the initial state shown in FIG.

  As described above, in the first mode, when the trigger 12 is first pulled (FIG. 6) and then the contact arm 6 is turned on (FIG. 7), the driving operation is not performed. Accordingly, for example, when the driving tool 1 is carried by holding the grip portion 3 and hooking the fingertip on the trigger 12 (while being pulled to the ON position), the contact portion 6a of the contact arm 6 is mistakenly moved to another portion. Even if it abuts, the driving operation is not performed. In the first mode, the driving operation is performed only when the contact arm 6 is first turned on (FIG. 8) and then the trigger 12 is pulled (FIG. 9). In this first mode, unless the trigger 12 is once turned off, the next driving is not performed (single shot).

Next, the operation state of the activation device 10 when the mode switching lever 7 is switched to the second mode side will be described. In the initial state shown in FIG. 5, both the first operating part 13 and the second operating part 14 (not shown in FIG. 5) are located on the off position side. When the trigger 12 is pulled to the ON position as shown in FIG. 10 from this initial state, the second ON position detection member 26 is turned ON and the output signal is input to the timer circuit 33 of the controller 30. However, since the first on-position detecting member 25 is not turned on at this stage, power is not supplied from the controller 30 to the solenoid valve 23, so that the solenoid valve 23 is held on the closed side and the second operating portion 14 is turned off. It is in the state located at the position. The timer circuit 33, the timer when the signal from the second on position sensing member 26 has been input is activated, then the elapsed time T ₁ is measured.

As shown in FIG. 11, when the contact arm 6 is subsequently turned on, the first on-position detection member 25 is turned on and the output signal is input to the timer circuit 33 of the controller 30. The timer circuit 33 is compared with the reference time T ₀ the elapsed time T ₁ is preset from the time when the signal of the second on position sensing member 26 is input to the signal of the first ON position detection member 25 is input The When it is determined that the elapsed time T ₁ is within the reference time T ₀ (T ₁ ≦ T ₀ ), the power circuit of the controller 30 is closed at this stage, and power is supplied from the battery 32 to the electromagnetic valve 23. When power is supplied, the solenoid valve 23 is switched to the open side. When the solenoid valve 23 is switched to the open side, the air pipes 22 and 24 are communicated, and compressed air is supplied from the pressure accumulating chamber 3a to the lower chamber 20ab of the cylinder portion 20a, whereby the second operating portion 14 resists the compression spring 21. Thus, the start valve 11 is turned on by being displaced to the on position side, so that the driving operation is performed in the main body 2.

On the other hand, the elapsed time from when the one ON signal of the first ON position detection member 25 and the second ON position detection member 26 is input to the timer circuit 33 of the controller 30 until the other ON signal is input. When T ₁ is larger than the reference time T ₀ (T ₁ > T ₀ ), the power supply from the battery 32 to the electromagnetic valve 23 is not performed. For this reason, in this case, the driving operation is not performed.

Thus, in the second mode, when the trigger 12 is turned on first and then the contact arm 6 is turned on within the reference time T ₀ , the first operating portion 13 is displaced to the on position and the electromagnetic valve 23 is supplied with power. As a result, the second operating part 14 is displaced to the ON position almost simultaneously. Since the trigger 12 is turned on first as in the first mode, the first actuating portion 13 passes (misses) to the side of the first idler 15 as shown in the figure. However, in the second mode, the second idler 16 is tilted to the on position independently by the displacement of the second operating portion 14 to the on position.

  In addition, as shown in FIG. 11, the 1st action | operation part 13 is the state which passed the side of the 1st idler 15 in the step which the 2nd idler 16 tilts to an ON position. For this reason, although the first idler 15 is biased in the direction of tilting toward the on position by the biasing force of the torsion spring 18, the displacement toward the on position is restricted by the first operating portion 13, so that the off position It has been left in the state. In the present embodiment, the normally idler is divided into the first idler 15 and the second idler 16 so that the second idler 16 moves to the on position alone, and the first idler 15 moves to the off position. The remaining state is allowed.

  The second idler 16 is tilted to the on position by the air force of the cylinder portion 20a, whereby the valve stem 11a is pushed by a necessary distance by the air force and surely moves to the on position. When the valve stem 11a is pushed by the displacement of the second operating part 14 through the second idler 16, the starting valve 11 is turned on, and thus the driving operation of the main body part 2 is performed.

  After the driving operation is performed once, when the contact arm 6 is turned off while the trigger 12 is pulled, the state shown in FIG. 10 is restored. As described above, in this state, the first on-position detecting member 25 is turned off by turning off the contact arm 6, so that the power supply from the controller 30 to the electromagnetic valve 23 is shut off. For this reason, when the solenoid valve 23 is switched to the closed side and the lower chamber 20ab of the cylinder portion 20a is opened to the atmosphere, the second operating portion 14 is returned to the off position side. When the pressing force to the on position side by the second operating portion 14 is lost, the second idler 16 is returned to the off position by the spring force of the valve stem 11a, and the start valve 11 is turned off. Although the first idler 15 is not restricted by the first operating portion 13, it is held side by side (off position) with the second idler 16 by the engaging edge portion 16a. Further, when the contact arm 6 is turned off, the first on-position detecting member 25 is turned off, whereby the timer circuit 33 is reset.

After returning to FIG. 10, if the contact arm 6 is turned on again within the reference time T ₀ while the trigger 12 is pulled, the second operating unit 14 moves to the on position again and pushes the second idler 16. Therefore, the start valve 11 is turned on, and hence the driving operation is performed again (sequential driving). While the trigger 12 depressed, those the contact portion 6a is brought into contact with the driven material by repeating the operation of turning on the reference time T in _0, the state shown in state and 11 shown in FIG. 10 of the contact arm 6 Can be repeated, and thus, repeated firing can be performed.

  Next, in the second mode, in contrast to the above, the contact arm 6 can be turned on first and then the trigger 12 can be pulled and driven. From the initial state shown in FIG. 5, the contact arm 6 is first turned on as shown in FIG. At this stage, the first on-position detection member 25 is turned on. However, since the trigger 12 is not pulled, the second on-position detection member 26 is in an off state, and accordingly, power is not supplied from the controller 30 to the electromagnetic valve 23. Since the electromagnetic valve 23 remains switched to the closed side when no power is supplied, compressed air is not supplied to the lower chamber 20ab of the cylinder portion 20a, and thus the second operating portion 14 is held in the off position.

After the contact arm 6 is turned on, if the trigger 12 is pulled within the reference time T ₀ as shown in FIG. Since the displacement of one idler 15 to the off position side is restricted, the valve stem 11a is pushed to the on position side in accordance with the pulling operation of the trigger 12, and as a result, the start valve 11 is turned on. When the start valve 11 is turned on, the driving operation of the main body 2 is performed.

  The second on-position detection member 26 is turned on by the pulling operation of the trigger 12. For this reason, the electromagnetic valve 23 is switched to the open side by the power supply from the controller 30, and the compressed air is supplied to the lower chamber 20ab of the cylinder part 20a, whereby the second operating part 14 is displaced to the on position side. As described above, when the contact arm 6 is turned on first in the second mode, both the first and second actuating parts 13 and 14 are displaced to the on position side. The first idler 15 is pushed by the first actuating portion 13 displaced to the side, and as a result, the second idler 16 is pushed to the on position side and the start valve 11 is turned on.

When the start valve 11 is turned on, a driving operation is performed in the main body 2. When the pulling operation of the trigger 12 is released after the driving operation, the activation device 10 returns to the state shown in FIG. Therefore, by pulling the trigger 12 again within the reference time T ₀ from the state shown in FIG. 12, the start valve 11 is turned on and the driving operation is performed again. The state shown in FIG. 12 and the state shown in FIG. 13 can be repeated by repeating the on / off operation of the trigger 12 within the reference time T ₀ while the contact arm 6 is turned on. In such a second mode, for example, so-called dragging can be efficiently performed by turning on the trigger 12 while shifting the driving tool 1 in the lateral direction while the contact arm 6 is turned on. Such dragging can be regarded as a single shot, as in the first mode, since a single driving operation is performed every time the trigger 12 is turned on.

According to the activation device 10 according to the present embodiment described above, in the second mode, when the time difference (elapsed time T ₁ ) between the on operation of the trigger 12 and the on operation of the contact arm 6 is within the reference time T _0. Timer control in which the driving operation of the main body 2 is performed is performed. For this reason, in the second mode, power (power for electrical control) for causing the controller 30 including timer control to function is supplied from the battery 32. For this reason, in the second mode, as a result of the controller 30 not functioning when the power source from the battery 32 is cut off or the remaining capacity of the battery 32 is reduced, the driving tool 1 is stopped. However, in the exemplified driving tool 1, by switching to the first mode, the driving tool 1 can be operated without being controlled by the timer control of the controller 30 (even if power is not supplied). Can be continued, and the workability of the driving tool 1 can be improved.

  Further, in the first mode, when the trigger 12 is pulled first, the driving operation is not performed (mechanical activation control) as a result of the contact arm 6 being turned on being invalid (oscillating). For this reason, for example, when carrying the driving tool 1 in a state where the grip portion 3 is gripped and the fingertip is hooked on the trigger 12 and is turned on, the contact portion 6a of the contact arm 6 is accidentally brought into contact with another portion. Even if it is a case (when turned on), an inadvertent driving operation will not be performed.

  Further, in the second mode, when a time difference exceeding the reference time T0 occurs between the ON operation of the trigger 12 and the ON operation of the contact arm 6, power is not supplied to the controller 30 or the electromagnetic valve 23, and accordingly The driving operation in the main body 2 is not performed. For this reason, when the grip portion 3 is gripped with the mode switching lever 7 switched to the second mode side and the driving tool 1 is carried on while the fingertip is hooked on the trigger 12 and kept on, the contact arm is erroneously Even when the contact portion 6a of 6 is brought into contact with another part (when turned on), an inadvertent driving operation is not performed.

  Moreover, according to the illustrated starting device 10, since the second operating unit 14 is configured to move to the on position by the air force of the compressed air, for example, a greater distance than a configuration using a solenoid actuator as a power source. The valve stem 11a of the start valve 11 can be reliably moved to the on position.

  Further, since the compressed air supplied as a power source for the driving operation of the main body 2 is diverted and the second operating part 14 is moved, the second operating part is used efficiently using the supplied compressed air. Thus, the activation device 10 can be operated.

  In addition, since the power of the battery 32 is used only for the second mode and the power is not consumed for the first mode, the power consumption is suppressed compared to the configuration that consumes the power for all driving operations. can do.

  Various modifications can be made to the embodiment described above. For example, the configuration using compressed air as a drive source for moving the second operating unit 14 to the on position is illustrated, but instead of this, a configuration using an electric motor and a rack and pinion mechanism, or a configuration using a solenoid actuator may be used. In these cases, the illustrated electromagnetic valve 23 can be omitted.

  Further, since the second operating portion 14 is moved between the on position and the off position by the cylinder portion 20a that is operated by switching the electromagnetic valve 23, the moving direction of the second operating portion 14 is not necessarily the first operation. It is not necessary to match with the part 13, and it is good also as a structure moved to a different direction. Furthermore, by extending the air pipe 22 further, the electromagnetic valve 23 can be disposed in a part (for example, in the grip part 3) away from the second operating part 14, and the degree of freedom in the layout of the activation device 10 can be increased. it can. A controller 30 and a battery 32 can be disposed in the grip portion 3.

  Moreover, although the nailing machine which uses compressed air as a drive source was illustrated as the driving tool 1, the illustrated starting device 10 can be similarly applied to a driving tool using an electric motor as a driving source.

DESCRIPTION OF SYMBOLS 1 ... Driving tool 2 ... Main-body part 2a ... Piston, 2b ... Piston upper chamber, 2c ... Cylinder, 2d ... Driver 2e ... Head valve 3 ... Grip part, 3a ... Accumulation chamber 4 ... Driving nose part 5 ... Magazine 6 ... Contact arm , 6a ... contact part, 6b ... extension part, 6c ... detection part 7 ... mode switching lever 8 ... compression spring 10 ... starter 11 ... start valve, 11a ... valve stem 12 ... trigger 13 ... first actuating part 14 ... first 2 working part, 14a ... piston part 15 ... 1st idler 16 ... 2nd idler, 16a ... engagement edge part 17 ... support shaft 18 ... torsion spring 20 ... support block part 20a ... cylinder part, 20aa ... upper chamber, 20ab ... Lower chamber 21 ... Compression spring 22 ... Air pipe 23 ... Solenoid valve 25 ... First on-position detection member 26 ... Second on-position detection member 30 ... Controller 31 ... Mode switching Switch 32 ... battery (power supply)
33 ... Timer circuit T ₀ ... Reference time T ₁ ... Elapsed time

Claims (8)

A driving tool for driving the main body on the condition that both the trigger ON operation and the contact arm ON operation are performed,
A first mode in which the driving operation of the main body is performed only when the trigger is turned on after the contact arm is turned on;
It is possible to switch the second mode in which the driving operation of the main body portion is performed regardless of whether the trigger or the contact arm is turned on and off,
Only in the second mode, timer control is performed in which the driving operation of the main body is performed when the time difference between one on operation of the trigger or the contact arm and the other on operation is within a preset reference time. Driving tool with a configuration. The driving tool according to claim 1, further comprising a starting valve that uses compressed air as a power source for driving operation, and switches a supply / exhaust state of the compressed air to the main body.
A first actuating portion that is provided integrally with the contact arm and moves between an on position for turning on the actuating valve and an off position for turning off the actuating valve; and the actuating valve is turned on independently of the first actuating portion. A second actuating part that moves between an on position and an off position to be turned off, wherein the first actuating part has a function of turning on and off the activation valve in both the first mode and the second mode; A driving tool in which the second operating part has a function of turning on and off the start valve only in the second mode. 3. The driving tool according to claim 2, wherein the second working unit is configured to move to the on position using compressed air supplied by switching of an electromagnetic valve as a power source. 4. The driving tool according to claim 3, wherein compressed air supplied to the second operating portion by switching the electromagnetic valve is diverted from a pressure accumulating chamber for accumulating compressed air supplied to the main body portion; Driving tool. The driving tool according to any one of claims 2 to 4, further comprising first and second idlers provided on the trigger so as to be relatively movable, wherein the first idler turns on the first operating unit. When the second idler is pushed by the movement to the on position and moved to the on position, the second idler is pushed by the movement to the on position of the second operating part, and the first idler moves to the on position. The second idler is integrally moved to the on position, and the second idler is provided so as to be independently movable to the on position independently of the first idler. The second idler is provided with a valve of the start valve. A driving tool configured such that when the stem is engaged, the valve stem is moved to the on position by the movement of the second idler to the on position, and compressed air is supplied to the main body. The driving tool according to any one of claims 3 to 5, wherein a first on-position detecting member for detecting an on-position of the contact arm and a second on-position detecting member for detecting an on-position of the trigger. Driving tool equipped with. 7. The driving tool according to claim 6, wherein the solenoid valve is turned on / off based on positional information of the contact arm and the trigger obtained by the first and second on-position detecting members and a time difference between the on-operations of the contact arm and the trigger. Driving tool equipped with a controller to control. 8. The driving tool according to claim 7, further comprising a mode switching lever for switching between the first mode and the second mode, wherein the controller receives power supply only when the mode switching lever is switched to the second mode. A driving tool configured to perform on / off control of the solenoid valve based on positional information of the contact arm and the trigger and a time difference between the on operations of the contact arm and the trigger.

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